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    Focal type electromagnetic acoustic transducer and flaw detection system and method
    1.
    发明授权
    Focal type electromagnetic acoustic transducer and flaw detection system and method 失效
    焦点型电磁声换能器及探伤系统及方法

    公开(公告)号：US6038925A

    公开(公告)日：2000-03-21

    申请号：US44929

    申请日：1998-03-20

    Applicant: Toshihiro Ohtani ,  Hirotsugu Ogi ,  Masahiko Hirao

    Inventor： Toshihiro Ohtani ,  Hirotsugu Ogi ,  Masahiko Hirao

    IPC: G01N29/04 ,  B06B1/02 ,  B06B1/04 ,  G01N29/24 ,  G10K11/34 ,  H02K3/26 ,  H02K33/12 ,  G01N9/24

    CPC classification number: G01N29/2412 ,  B06B1/045 ,  G01N29/2456 ,  G10K11/346 ,  H02K3/26 ,  H02K33/12 ,  B06B2201/54

    Abstract: A focusing electromagnetic acoustic transducer is provided which comprises a pair of meander coils, three insulation sheets and a magnet. The meander coils are formed on both surfaces of one of the insulation sheets to be positioned such that the meander coils are coincident with each other, and they are covered with the other insulation sheets. Each of the meander coils comprises a plurality of coil segments wherein intervals between adjacent coil segments sequentially are varied from one end to the other end. The magnet is positioned above the layers consisting the meander coils and insulation sheets. The coil segments of each meander coil are straight lines in parallel with each others, sector shapes on respective circulars having the same center point, or generally circular shapes having the same center point.

    Abstract translation: 提供一种聚焦电磁声换能器，其包括一对曲折线圈，三个绝缘片和磁铁。 曲折线圈形成在绝缘片之一的两个表面上，以使得曲折线圈彼此重合，并且被其它绝缘片覆盖。 每个曲折线圈包括多个线圈段，其中相邻线圈段之间的间隔从一端到另一端依次变化。 磁铁位于由曲折线圈和绝缘片组成的层之上。 每个曲折线圈的线圈段是彼此平行的直线，各圆形上的扇形形状具有相同的中心点，或者具有相同中心点的大致圆形形状。

    METHOD AND SYSTEM FOR SEARCHING FOR RESONANT FREQUENCY OF TRANSDUCER
    3.
    发明申请
    METHOD AND SYSTEM FOR SEARCHING FOR RESONANT FREQUENCY OF TRANSDUCER 有权
    用于搜索谐振频率的传感器的方法和系统

    公开(公告)号：US20160061652A1

    公开(公告)日：2016-03-03

    申请号：US14934904

    申请日：2015-11-06

    Applicant: REACH SURGICAL INC. ,  China Surgical (Shanghai) Corporation,

    Inventor： Yadong ZHANG ,  Qizhang CHEN

    IPC: G01H13/00

    CPC classification number: G01H13/00 ,  B06B2201/54 ,  B06B2201/55 ,  G01H11/06 ,  H01L41/09 ,  H04R3/04 ,  H04R29/001

    Abstract: A system for searching for a resonant frequency of a transducer, comprising: an initializing unit (11), a phase determining unit (12), an interval hopping control unit (13), a hopping interval generating unit (15), a frequency output control unit (17), a phase acquiring unit (16), and a resonant frequency obtaining unit (14). The search range of the interval for the last search can be narrowed by at least half thereof in each frequency hopping, thus allowing for reduced amount of searches.

    Abstract translation: 一种用于搜索换能器的谐振频率的系统，包括：初始化单元（11），相位确定单元（12），跳频控制单元（13），跳频间隔产生单元（15），频率输出 控制单元（17），相位获取单元（16）和谐振频率获取单元（14）。 在每次跳频中，上次搜索的间隔的搜索范围可以至少缩小一半，从而允许减少搜索量。

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